# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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import fbgemm_gpu  # for asynchronous_complete_cumsum
import torch


def length_to_complete_offsets(length_tensor: torch.Tensor):
    offsets = torch.ops.fbgemm.asynchronous_complete_cumsum(length_tensor)
    return offsets


def length_to_inclusive_offsets(length_tensor: torch.Tensor):
    offsets = torch.ops.fbgemm.asynchronous_inclusive_cumsum(length_tensor)
    return offsets


def length_to_exclusive_offsets(length_tensor: torch.Tensor):
    offsets = torch.ops.fbgemm.asynchronous_exclusive_cumsum(length_tensor)
    return offsets
